Service manual

“How often do I have to clean out the pump fi lters, spray arms, or scrap box tray?”
They should be cleaned after every meal period
“Does the machine need to be turned off at night?”
Yes. Always turn off electrical equipment when not in use or when the facility is closed.
“Can they wash their fl oor mats in the dishmachine?”
No. The fl oor mats carry fl oor bacteria and soils into the dishmachine. This should never be done in a
machine used for cleaning public eating utensils. The practice of washing fl oor mats or mops in a
commercial dishmachine is prohibited by FDA Food Code in section 6-501.15
“Can the dishmachine be washed down during clean up?”
No, it is considered electrical equipment. While it is true the inside tank can be washed out with a hose, the
machine itself cannot be safely hosed down with water or sprayers.
“How do I ‘de-lime’ the machine?”
This treatment should ONLY BE PERFORMED BY TRAINED AUTHORIZED PERSONNEL. The addition
of de-scale acids, if chlorine sanitizer is present, can produce hazardous gas. The HT-25 machine has a
de-lime service switch locked inside the control box. The machine should be drained, clear water added and
then the de-lime switch turned on (which only runs the pump). At this point, the acid product can be safely
added to the water by pouring into the tank. Refer to the printed instructions on the bottle for dilution rates.
Caution: do not let acid sit in the machine unattended or overnight.
Category 5, “RESULTS,” OR WHY MY DISHES DID NOT COME OUT CLEAN?
“Why are the glasses and silverware coming out with streaks and fi lmy appearance?”
The dishmachine does not produce white liquid or grease. So, if clean heated water (120°F min) is supplied
to the machine, chemicals adjusted correctly, and the fi ve machine functions of the machine are in place
(start, wash spray, heat water, convey, rinse spray) —the problems come from procedure or water condi-
tions. Rub the glass with fi ngers; if the fi lm runs or feels greasy, it is likely a build up of grease and fats.
Check temperatures and detergent settings. If cloudy substance or fi lm disappears after placing a glass half
way in a bowl of delime acid, it comes from supply water minerals and must be treated separately.
“Why are the glasses coming out with specs on them?”
Specs that show up on glassware when they are still wet are actually very small particles that are magnifi ed
through the curvature of water. These specs are usually food soil carry-over, though sometimes faulty water
softeners and boiler equipment can send particles through the fi nal rinse.
A typical dishwasher can assimilate approximately 60 ml of soil solids per batch or rack. More than this
saturates the wash and rinse actions leaving specs inside and on dishware. This comes from poor
pre-scraping procedures.
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